Should he work in agriculture with a riba-based loan?

Riba (usury,
interest) is a major sin, which is forbidden according to the Qur’aan and
Sunnah and the consensus of the Muslims. 

Allaah says
(interpretation of the meaning): 

“Allaah
has permitted trading and forbidden Ribaa”

[al-Baqarah 2:275]

“and give
up what remains (due to you) from Ribaa (from now onward) if you are
(really) believers.

279. And
if you do not do it, then take a notice of war from Allaah and His Messenger
but if you repent, you shall have your capital sums. Deal not unjustly (by
asking more than your capital sums), and you shall not be dealt with
unjustly (by receiving less than your capital sums)”

[al-Baqarah 2:278-279]

It was
narrated that Jaabir (may Allaah be pleased with him) said: The Messenger of
Allaah (peace and blessings of Allaah be upon him) cursed the one who
consumes riba, the one who pays it, the one who writes it down and the two
who witness it, and he said they are all the same. Narrated by Muslim
(1598). 

You are not
obliged to take part in the government program, so you are not obliged to
acquire the riba-based loan in order to engage in agriculture. 

If working
in agriculture is becoming too difficult for you, and you are obliged to
seek a riba-based loan, then look for another source of income. Allaah says
(interpretation of the meaning): 

“And
whosoever fears Allaah and keeps his duty to Him, He will make a way for him
to get out (from every difficulty)”

[al-Talaaq 65:2]

Harm that
befalls one in this world is not comparable to harm in the Hereafter, and
losing wealth in this world is easier than losing one’s religious
commitment. 

Allaah
included the believers in the command that He enjoined upon the Messengers,
to seek halaal provision and eat good (halaal) food. Allaah says
(interpretation of the meaning): 

“O (you)
Messengers! Eat of the Tayyibaat [all kinds of Halaal (lawful) foods which
Allaah has made lawful (meat of slaughtered eatable animals, milk products,
fats, vegetables, fruits)] and do righteous deeds. Verily, I am
Well‑Acquainted with what you do”

[al-Mu’minoon 23:51]

al-Qurtubi
said: 

Here Allaah
addressed the Prophets and the believers alike with the command to eat
halaal and avoid haraam, then He addressed the implied warning to all of
them too, in the words “Verily, I am Well‑Acquainted with what you do”. 
May Allaah send blessings upon His Messengers and Prophets. 

Tafseer
al-Tabari (12/128) 

Islam urges
us to seek that which is halaal and avoid that which is haraam. Our Lord
tells us that He is the Provider and the Almighty Who is able to provide for
whomever He will without measure. 

It was
narrated that Jaabir (may Allaah be pleased with him) said: The Messenger of
Allaah (peace and blessings of Allaah be upon him) said: “Do not
despair of receiving provision, for no person will die until he has received
the last of his provision, so fear Allaah and be reasonable in seeking
provision; take that which is halaal and forsake that which is haraam.” 

Narrated by
Ibn Hibbaan (8/32) and al-Haakim (2/4). Classed as saheeh by al-Albaani in
al-Silsilah al-Saheehah (2607). 

And Allaah
is the Source of strength.