عنوان

Technical and financial feasibility of shelterbelt and block plantation agroforestry systems in Punjab, Pakistan

Number

TLpq304286023

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Technical and financial feasibility of shelterbelt and block plantation agroforestry systems in Punjab, Pakistan

General Material Designation

[Thesis]

First Statement of Responsibility

M. Akram

Subsequent Statement of Responsibility

T. L. Thurow

Name of Publisher, Distributor, etc.

Texas A&M University

Date of Publication, Distribution, etc.

1995

Specific Material Designation and Extent of Item

109

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

Texas A&M University

Text preceding or following the note

1995

Text of Note

Two studies were conducted to determine the technical and financial feasibility of agroforestry systems in Punjab, Pakistan. One study was on cultivated land and examined the effects of single row, 6 to 7usd1\over2usd year old, shelterbelts on wheat and sorghum yield. Three different row spacings (10 m, 12 m and 15 m) of Eucalyptus camaldulensis and Bombex ceiba were studied. The other study was on saline fallow land and examined the feasibility of using block plantations to reclaim the soil. Acacia nilotica and Eucalyptus camaldulensis were grown as monocultures and as a mixed plantation for six years and the yield, economics and soil amelioration were documented. In the shelterbelt study, photosynthetically active radiation (PAR) was the variable most strongly correlated with production of wheat (r = 0.67) and sorghum (r = 0.89). Wheat yield was least within 1 m of the trees and increased as distance from the trees increased up to 5 m. Beyond 5 m there was no significant difference in yield. Wheat production was greater adjacent to B. ceiba than E. camaldulensis. There was no significant difference in wheat yield between year six and seven, but the seventh year yield was consistently lower than the sixth. The benefit cost ratio (B:C) and net present value (NPV) were greater in all agroforestry treatments than the agronomic monoculture and they were greater in narrow tree row spacing than wider row spacing. In the block plantation study, E. camaldulensis had a greater bole length and girth in the mixed plantations, possibly because of the greater availability of nitrogen associated with the presence of the leguminous A. nilotica. All three treatments had a very attractive B:C, NPV and internal rate of return; the mixed plantation had a greater return than the monocultures. Organic matter, N, P, and K increased and Na, SAR, pH, EC, and bulk density decreased in the soils under the trees compared to fallow plots.

Acacia nilotica

Biological sciences

Bombex ceiba

Eucalyptus camaldulensis

Social sciences

soil reclamation

M. Akram

T. L. Thurow

Electronic name

p

[Thesis]

276903

a

Y