---
title: Why does farming in deserts need irrigation? — Food and farming around the world · tree and pragmatics
description: Why does farming in deserts need irrigation? Test 9 of lesson 26 «Food and farming around the world» of the geography course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wrong.
---

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# Test 9 · Food and farming around the world

<!-- .ven lang=en -->
Why does farming in deserts need irrigation?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** deserts · **What happens:** do, need · **To what, where:** farming, irrigation

<!-- .vabout -->
This is test 9 of lesson 26 «Food and farming around the world» of the geography course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/geography/26-food-and-farming-around-the-world/#t9).

## The question {#question}

```conllu
# sent_id = question:geography:26-food-and-farming-around-the-world:t9:1
# text = Why does farming in deserts need irrigation?
1	Why	why	ADV	WRB	PronType=Int	0	root	_	_
2	does	do	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	advcl	_	_
3	farming	farming	NOUN	NN	Number=Sing	2	obj	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	deserts	desert	NOUN	NNS	Number=Plur	6	nsubj	_	_
6	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	parataxis	_	_
7	irrigation	irrigation	NOUN	NN	Number=Sing	6	obj	_	SpaceAfter=No
8	?	?	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present |  | farming |  |  |  |  | vn act-114-1 «NP V NP»: agent=Agent farming=Eventuality |
| 2 | **need** | present | deserts | irrigation |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot irrigation=Theme |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Desert crops need salt water

```conllu
# sent_id = question:geography:26-food-and-farming-around-the-world:t9:o1:1
# text = Desert crops need salt water
1	Desert	desert	NOUN	NN	Number=Sing	2	compound	_	_
2	crops	crop	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	salt	salt	NOUN	NN	Number=Sing	5	compound	_	_
5	water	water	NOUN	NN	Number=Sing	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | Desert crops | salt water |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot water=Theme |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
There is too little rain to water the crops

```conllu
# sent_id = question:geography:26-food-and-farming-around-the-world:t9:o2:1
# text = There is too little rain to water the crops
1	There	there	PRON	EX	PronType=Dem	2	expl	_	_
2	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	too	too	ADV	RB	_	4	advmod	_	_
4	little	little	ADJ	JJ	Degree=Pos	5	amod	_	_
5	rain	rain	NOUN	NN	Number=Sing	2	nsubj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	water	water	NOUN	NN	Number=Sing	5	conj	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	crops	crop	NOUN	NNS	Number=Plur	2	nsubj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **does** | present | little rain and water |  |  | there |  |  | vn exist-47.1 «NP V»: agent=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
Desert sun makes plants grow too fast

```conllu
# sent_id = question:geography:26-food-and-farming-around-the-world:t9:o3:1
# text = Desert sun makes plants grow too fast
1	Desert	desert	NOUN	NN	Number=Sing	2	compound	_	_
2	sun	sun	NOUN	NN	Number=Sing	3	nsubj	_	_
3	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	plants	plant	NOUN	NNS	Number=Plur	3	obj	_	_
5	grow	grow	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	too	too	ADV	RB	_	7	advmod	_	_
7	fast	fast	ADV	RB	Degree=Pos	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Desert sun | plants |  |  |  | fast *property* | tree rules |
| 2 | **grow** | infinitive | plants *not said here* |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
Irrigation keeps animals off the fields

```conllu
# sent_id = question:geography:26-food-and-farming-around-the-world:t9:o4:1
# text = Irrigation keeps animals off the fields
1	Irrigation	irrigation	NOUN	NN	Number=Sing	2	nsubj	_	_
2	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	animals	animal	NOUN	NNS	Number=Plur	2	obj	_	_
4	off	off	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	fields	field	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | Irrigation | animals |  |  |  | off the fields | vn keep-15.2 «NP V NP»: agent=Agent animal=Theme |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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