Reference for Kilayim 5:1
כֶּרֶם שֶׁחָרַב, אִם יֶשׁ בּוֹ לְלַקֵּט עֶשֶׂר גְּפָנִים לְבֵית סְאָה, וּנְטוּעוֹת כְּהִלְכָתָן, הֲרֵי זֶה נִקְרָא כֶּרֶם דַּל. כֶּרֶם שֶׁהוּא נָטוּעַ עִרְבּוּבְיָא, אִם יֶשׁ בּוֹ לְכַוֵּן שְׁתַּיִם נֶגֶד שָׁלֹשׁ, הֲרֵי זֶה כֶרֶם. וְאִם לָאו, אֵינוֹ כֶרֶם. רַבִּי מֵאִיר אוֹמֵר, הוֹאִיל וְהוּא נִרְאֶה כְתַבְנִית הַכְּרָמִים, הֲרֵי זֶה כָרֶם:
A vineyard that has become destroyed [uprooted or dried out], if it is possible to pick [grapes] from ten vines within a <i>beit se'ah</i> and they were planted according to the law, it is called a poor vineyard. A vineyard that has been planted in an irregular fashion [not in sraight rows], if there are among them [five vines] two opposite three [two facing each other and one projecting like a tail], it is considered a vineyard, but if not, it is not considered a vineyard. Rabbi Meir says, Since it appears in the form of a vineyard [it has rows of vines although not in sraight rows] it is in a vineyard.