Abel’s identity a1b1+a2b2+· · ·+ambm = (b1+b2+· · ·+bm)am+(b1+· · ·+bm−1)(am−1−am)+· · ·+b1(a1−a2) is used to give a refinement of a recent theorem of Sellers.

This experiment was a factorial randomized block design (RAK). The screen house used the of experimental garden Faculty Agricultural and Animal Sciences, Indonesian National Islamic University. land taken from coast Kuala Kab. Bireuen, Aceh. Soil top soil layer with depth 0-25 cm. Mycorrhizae were placed in planting holes around root area at 2-3 cm according to treatment per plant before seeds ...

abstract land use change, especially natural ecosystems transformation, has high effects on soil physico-chemical as well as biological characteristics and also, has effect on runoff and soil erosion. analysis of runoff and soil erosion dynamics can be useful in improvement of management proposals and quantifying runoff and soil erosion changes. so, this research was carried out to investigate ...

Let X be an n–element finite set, 0 < k ≤ n/2 an integer. Suppose that {A1, A2} and {B1, B2} are pairs of disjoint k-element subsets of X (that is, |A1| = |B1| = |A2| = |B2| = k,A1 ∩ A2 = ∅, B1 ∩ B2 = ∅). Define the distance of these pairs by d({A1, A2}, {B1, B2}) = min{|A1 − B1| + |A2 − B2|, |A1 −B2|+ |A2 −B1|}. Let C(n, k, d) be the maximum size of a family of pairs of disjoint subsets, such ...

The aim of this study was to investigate the climate change impacts on some factors affecting rainfed wheat growth such as effective rainfall, planting date and length of growing season in four stations located in Chaharmahal and Bakhtiari province. Firstly, it is necessary to predict future (2046-2065) climatic conditions. For this purpose, the output of HADCM3 general circulation model was us...

ABSTRACT-This paper aims to develop a new design of a bentleg (BL) plow and to determine its performance as compared to the conventional one using finite element approach. The difference between the modified and conventional BL plows is the direction of angle between the projection of cutting blade on horizontal plane normal to plow shank and the line perpendicular to the plow shank in the same...

The effect of seeding depth on emergence of red rice (Oryza sativa) ecotypes from Arkansas (AR), Louisiana (LA), and Mississippi (MS) was determined under dry-seeded rice production in clay and silt loam soils in Arkansas. By 21 d after planting (DAP), all red rice ecotypes had emerged from planting depths of 1.3, 2.5, 5.0, and 7.5 cm in both clay and silt loam soils. In silt loam soil, seedlin...

the objective of this study was to determine the allowed and desired limits for heavy soils of texture (clay loom), as it has operational capability (friability), these limits were 6.34 mm for planting and 10.62 mm for harvesting in each raining or irrigation episode. we determined some factors that affect soil wetness and water content as follow: the amount and severity of rain, the condition ...

Proof: We proved in class (Proposition 2.4.1) that there is at least one triangle-or-anti-triangle, call its vertices {a1, a2, a3}. There are at least three additional distinct vertices, b1, b2, and b3. If all of b1, b2, and b3 are adjacent to each other, then {b1, b2, b3} is a triangle. If none of b1, b2, and b3 is adjacent to any other, then {b1, b2, b3} is an anti-triangle. Assume without lo...