NATIONAL OPEN UNIVERSITY OF NIGERIA

91, CADASTRAL ZONE, UNIVERSITY VILLAGE, JABI, ABUJA

FACULTY OF AGRICULTURAL SCIENCES DEPARTMENT OF CROP AND SOIL SCIENCES

2020_2 SEMESTER EXAMINATION 1234

EXAMINATION: SECOND SEMESTER EXAMINATION 2020_2 COURSE: ARABLE CROP PRODUCTION

COURSE CODE: ACP301 TOTALSCORE: 70 MARKS

TIME ALLOWED: 2hours 30 minutes

INSTRUCTION: Answer FOUR Questions in all. Question 1 is compulsory (25marks) and any three questions (15 marks each)

Question 1.

a) Give a description of annual crops according to

(i) Longevity/life span (ii) Growth pattern/ crop architecture

b) Classify annual crops according to uses.

c) (c) State at least one industrial use of any five annual crops

d) (d)List any five cultural practices on the farm

a) List (using the scientific names only of) any two arable crops in each category of uses.

b) List any two crops in the category of (i) annual (ii) bi-annual crops

c) Write short notes on the following:

(i) Sexual reproduction

(ii) Asexual reproduction

a) List any five climatic factors to be considered in setting up an arable field

b) List any five edaphic factors to be considered in setting up an arable field.

c) Explain the advantages of having a good seed bed preparation

a) Write a short explanatory notes on each of the following

( i) Weeding.( ii) Mulching ( iii) Thinning (iv) Supplying ( v) Pruning ( vi) Staking

b) State any 2 groups of organisms causing plant diseases or reduction in crop yield.

a) List any four mineral fertilisers used in the production of arable crop.

b) Identify all the elements fund in fertiliser

c) Describe four methods of fertiliser application

a) Describe harvesting and Four tools for harvesting.

b) List four harvest indices

c) Describe Four primary processing methods